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<?php |
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namespace App\Rules; |
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use Illuminate\Contracts\Validation\Rule; |
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class SeatMapLayout implements Rule |
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{ |
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/** |
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* Create a new rule instance. |
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* |
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* @return void |
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*/ |
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public function __construct() |
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{ |
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// |
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} |
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/** |
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* Determine if the validation rule passes. |
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* Only allow json structures like... |
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* |
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* [ |
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* "aaaaaaa______aaaaaaa", |
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* "aaaaaaa______aaaaaaa", |
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* "aaaaaaa_____aaaaaaa", |
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* "aaaaaaa____aaaaaaa", |
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* "aaaaaaa___aaaaaaa", |
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* ... |
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* ] |
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* |
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* @param string $attribute name of the validated field |
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* @param mixed $value of the validated field |
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* @return bool |
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*/ |
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public function passes($attribute, $value) |
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{ |
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if($value === NULL || $value === "") { |
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// it is allowed for the value to be empty |
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return true; |
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} |
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// try to decode the json array with the expected format |
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$rows = json_decode($value); |
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// if json_decode result is falsy, then json object could |
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// not be decoded and therefore the input is invalid |
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if(!$rows) { |
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return false; |
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} |
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// iterate over all rows to check that only valid |
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// characters ('a' and '_') have been submitted |
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foreach( $rows as $row ) { |
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// explanation for regex ^[a_]*$ |
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// ^ = Start of string |
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// [a_] = Only characters "a" and "_" allowed |
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// * = zero or more characters |
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// $ = End of string |
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// Complete: Only match strings that contain from start to end only zero or more characters on the whitelist of a and _ |
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if( !preg_match('/^[a_]*$/', $row) ) { |
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return false; |
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} |
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} |
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// finally return true for a valid input, |
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// since no previous check proved the contrary |
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return true; |
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} |
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/** |
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* Get the validation error message. |
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* |
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* @return string |
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*/ |
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public function message() |
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{ |
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return 'The layout does not comply to the required format.'; |
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} |
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} |
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gegmar /
cluber
